Notes Redemption (Detail)	Oct. 15, 2012 11.5% Senior Notes due 2020	Oct. 28, 2012 8.125% Senior Secured First Priority Notes due 2019	Oct. 28, 2012 11% Senior Secured Second Priority Notes due 2020	Oct. 28, 2012 14.875% Senior Notes due 2020
Debt Instrument [Line Items]
Redemption Rate, 2015		106.094%		111.1563%
Redemption Rate, 2016	105.75%	104.063%	105.50%	107.4375%
Redemption Rate, 2017	102.875%	102.031%	102.75%	103.7188%
Redemption Rate, 2018 and thereafter	100.00%	100.00%	100.00%	100.00%